EA022792B1

EA022792B1 - Method of producing electric-grade wire from aluminium alloy

Info

Publication number: EA022792B1
Application number: EA201300749A
Authority: EA
Inventors: Юрий Георгиевич Аникеев
Original assignee: Открытое Акционерное Общество Объединение "Мастер"
Priority date: 2010-01-19
Filing date: 2010-10-04
Publication date: 2016-03-31
Also published as: EA201300749A1; RU2422223C1; EA019089B1; EA201001463A1; UA98049C2

Abstract

The technical solution relates to metal forming process, in particular to producing wire by continuous drawing. The technical result is increased microcontinuity of wire surface, its strength, electric conductivity, and reduced cost of wire manufacturing. The technical result is attained by a method of wire manufacturing characterised by cold drawing of wire blanks through a grooved roll, annealing and natural cooling of blanks in a cold furnace at an ambient temperature, then heating in a furnace to 350-450°C and holding in heated state. Then the blanks are cooled and their ends are welded forming a long string, which is subjected to drawing, said cycle of wire blank string treatment being performed repeatedly.

Description

(57) Техническое решение относится к области обработки металлов давлением, в частности к изготовлению проволоки методом ее многократного волочения. Техническим результатом является повышение микросплошности поверхности проволоки, ее прочности, ее электропроводности, а также снижение затрат на изготовление проволоки. Технический результат получен способом изготовления проволоки, характеризующимся тем, что осуществляют холодное волочение проволочных заготовок через калиброванный волок, проводят отжиг и естественное охлаждение заготовок в холодной печи, имеющей температуру окружающей среды, далее разогревают в печи до 350-450°С и выдерживают в нагретом состоянии. После заготовки остужают и сваривают их концы, образуя длинную плеть, которую подвергают волочению, причем изложенный цикл обработки плети проволочной заготовки проводят многократно.(57) The technical solution relates to the field of metal forming, in particular to the manufacture of wire by the method of its multiple drawing. The technical result is to increase the micro-continuity of the wire surface, its strength, its electrical conductivity, as well as reducing the cost of manufacturing the wire. The technical result is obtained by a method of manufacturing a wire, characterized in that cold drawing of the wire blanks through a calibrated wire is carried out, annealing and free cooling of the workpieces in a cold furnace having an ambient temperature is carried out, then they are heated in an oven to 350-450 ° C and kept in a heated state . After the workpiece, their ends are cooled and welded, forming a long whip, which is subjected to drawing, and the stated cycle of processing the whip of the wire billet is carried out repeatedly.

Техническое решение относится к области обработки металлов давлением, в частности к изготовлению проволоки методом ее многократного волочения, причем такая проволока, в частности, изготовлена из алюминиевого сплава, отвечающего по своим физическим и механическим свойствам большим нагрузкам на разрыв при растяжении и большой электропроводности. Техническое решение предназначено для использования в области металлургии.The technical solution relates to the field of metal forming, in particular to the manufacture of wire by the method of multiple drawing, moreover, such a wire, in particular, is made of aluminum alloy, which in its physical and mechanical properties responds to high tensile tensile loads and high electrical conductivity. The technical solution is intended for use in the field of metallurgy.

Известны конструктивные решения проволоки и способы ее изготовлении, причем каждое техническое решение включает операции волочения проволоки, отжига, нормализации, проволока выполнена из мягких металлических сплавов, отвечающих условиям обработки металлов давлением путем волочения, причем при изготовлении проволоки волочение заготовки проволоки производят многократно (ΟΝ1188810Α, 1998-07-29,Structural solutions of the wire and methods for its manufacture are known, and each technical solution includes the operations of wire drawing, annealing, normalization, the wire is made of soft metal alloys that meet the conditions of metal forming by drawing, and in the manufacture of wire, the wire blank is drawn repeatedly (ΟΝ1188810Α, 1998 -07-29,

Claims

1. A method of manufacturing an electrical wire, characterized in that the wire is selected from aluminum alloy in the form of several wires, each of which in cross section has a larger diameter Ό in comparison with the diameter ά of the manufactured electrical wire, carry out cold drawing of wire blanks through a calibrated die, conduct annealing and natural cooling of wire billets to ambient temperature, while for the specified annealing and cooling wire the preparations are loaded into a cold furnace having an ambient temperature, then the preforms are heated in the furnace to 350-450 ° C, the wire preforms are kept heated in the furnace for 35-70 minutes, the coils of wire preforms are removed from the furnace and cooled to ambient temperature medium, then weld the ends of the wire billets, forming from them a long whip of one wire billet, which is subjected to drawing, and the foregoing cycle of processing a whip of a wire billet is carried out repeatedly and in the process of multiple drawing wire billet reduce the initial diameter Ό of the wire billet to a diameter of ά1 wire billet in the range of ratios ά1 = Ό (0,13-0,12), reducing the diameter Ό of the wire billet is carried out stepwise along the established routes, after which the wire billet rolled into a bay is subjected final annealing, cooling, and finishing drawing to obtain a given diameter ά of the finished wire, and when finishing drawing, the wire blank is brought to a predetermined diameter ά by reducing the diameter meters of the workpiece by the value ά = ά1 (0.55-0.45).

2. A method of manufacturing a wire according to claim 1, which consists in the fact that the wire billet is selected with a tensile strength in the range of 16-18 kgf / mm ² with a length of 0.9-1.1 m and a diameter of 7-9 mm.

3. A method of manufacturing a wire according to claim 1 or 2, which consists in the fact that in the manufacture of a wire having a diameter of 0.50 mm or less, on the first route for drawing the workpiece, its diameter is reduced in the range from 8.00 to 7.20 mm, on the second drawing route, the diameter of the wire rod blanks is reduced from 7.20 to 6.48 mm, on subsequent routes of drawing the wire rod blanks, its diameter is reduced from 6.48 to 5.83 mm, respectively; from 5.83 to 5.24 mm; from 5.24 to 2.25 mm; from 2.25 to 1.00 mm and on the last route the diameter of the wire billet is reduced from 1.0 to 0.50 mm and less than the last value.

4. A method of manufacturing a wire according to claim 3, which consists in the fact that for a wire billet having the specified tensile strength, the first route is characterized by a multi-stage reduction in the diameter of the wire billet according to the scheme: 8.00-7.20-6.48-5 , 83-5.24 mm, the second route for reducing the diameter of the workpiece is characterized by the scheme: 5.24-4.72-4.25-3.8-3.44-3.10-2.79-2.512.25 mm, the third and the fourth routes are characterized by the schemes, respectively: 2.25-2.03-1.83-1.651.48-1.33-1.20-1.08-1.00 mm and 1.0-0.90-0, 81-0.73-0.66-0.59-0.53-0.50 mm, while after the last drawing route annealing the workpiece do not spend.